William w



(No Model.) x W. W. DAVIS.

LOCK.

Patented June 12, 1894.

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UNITED STATES PATENT Futon.

WILLIAM vv. DAvIs, on" NEW YORK, N. Y.

SPECIFICATION forming part of Letters vZPatent N o. 521,366, dated J une 12, 1894.

Application filed October 5, 1893.

To @ZZ whom it may concern:

Be it known that I, WILLIAM W. DAvIs, of the city, county, and State of New York, have invented a new and Improved Door-Lock, of which the following is a full, clear, and exact description.

My invention relates to improvements in door locks. The ordinary door lock is provided with a slide bolt which projects when the door is open, and which is quite likely to catch with its sharp edges or corners upon the clothing or hands of people passing the door; and the object of my invention is` to obviateY these objections and to produce a simple and inexpensive lock mechanism which may be readily applied to any door and door frame, which is constructed in such a way that the door and frame will be perfectly or substantially smooth, offering no projections to catch the clothing of passers-by, and further, to construct the said mechanism in such a manner that the door may be readily operated by precisely the same motions as are customarily used with the ordinary knob and the usual arrangement of mechanism.

To these ends, my invention consists of certain features of construction and combinations of parts, as will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar gures of reference indicate corresponding parts in all the views.

Figure 1 is a broken perspective view of a door and frame, provided with my improved lock. Fig. 2 is a sectional plan of the lock mechanism with the door ajar. Fig. 3 is a similar section, but with the door closed. Fig. 4 is a sectional plan of a modified form of the lock mechanism, and Fig. 5 is a detail side view of the knob spindle mechanism.

The lock is provided'with a case 10, of substantially the usual kind, which is adapted to be countersunk in the ordinary way in the door 1], and the lock may be provided with the customary bolt 12 operated in the usual way by a key or it may be used without the said bolt ifv desired, and the hole in which slides the ordinary spindle-operated bolt is, in my apparatus, closed by a swinging fiy 13,

Serial No. 487,260. (No model.)

kthe bolt being dispensed with, and this fly is a shoulder 15 which is adapted to close against the lock case so as to permit the fly to exactly fill the hole in the case and lie flush with the face plate of the case and with the edge of the door. The fly 13 has on its back side a lug 16, which is pressed by a light spring 17 so as to hold the fly normally closed. It Will will thus be seen that the edge of the door, when the door is open, is perfectly smooth and there is no obstruction to catch upon the clothing or to present an unsightly appearance. The door swings opposite the usual keeper plate 18 which is fixed in the frame 19, which keeper plate is preferably provided with a casing 155a which is countersunk in the frame and as the door closes opposite the keeper plate it swings against a jamb or shoulder 19a. The keeper plate is provided with a hole 2O which comes exactly opposite the i'ly 13 of the door when the latter is closed, and in the hole of the keeper plate is pivoted a swinging latchl 21 which is of a generally triangular shape, being pivoted at its smaller end and .having its larger end pressed no'rmally outward, as illustrated in Fig. 2, but by reference to said figure it will be seen that the outer edge of the shoulder 19a and the outer edge of the latch so nearly align that there is but little opportunity for the clothing of a person to catch on the latch, 'and this is further obviated by rounding the end and edges of the latch. The latch 21 is provided on its inner side and atits free edge with a projecting shoulder 22, which, by engagingthe back side of the keeper plate 18, prevents the latch from being pressed out too far byaspring23, which is securedto the case 18a and which presses against the back of the latch 21 so as to hold one side of the latch in an extended position, as shown in Fig. 2. The springl 23 when the door 11 is closed, the latch 21 is first pushed inward, as in Fig. 2, by the edge of the door which strikes it and which is here protected by an extension 89 of the case .10, Which extension 39 is flush with the edge of y is stiffer than the spring 17, and consequently too` 10, and the door is thus held closed. llt may be opened and the latch thrown back by means of the door knob in the usual way, asl, described below. The door is provided with" the usual lock spindle 24, which projects through the case 10 in the customary manner,` and has at its outer ends the knobs 25 by which it may be turned. The spindle is provided also with tumblers 26, which are of substantially the usual kind, and these are adapted to engage studs 27 on the slide bolt 28 `which is held in suitable guides 29,.and `is adapted `to be thrown endwise against the back of the fly 13, so as to force the sameoutward until it shall be iush with i the'face of the case 10, and thus push the latch 21 back within the case 18a of the keeper plate 18, at`

ter which the door may be opened. When the `knob is released by the hand, it resumes its normal position, with vthe bolt 23 so retracted as to be always ready for a similar operation precisely like any ordinary knob and its arrangements.

Itwill be seen from the above description that the door Y is adapted to lock automatically in the usual way when closed, that it may be opened in the ordinary manner and that when opened there is `nothing about the lock to catch and tear the clothing of any person passing it.

The lock shown in Figs. 1 to 3 is adapted for common use and may be cheaply built, but the form of lock shown` in Fig. 4'may be built for nicer doors at a little more expense, and this form is arranged so that both the keeper plate and the free edge of the door 4are perfectly smooth. The modification relates entirely to the mechanism in the keeper plate, as thatr in the door is exactly similar to the` mechanism described above.

The latch21, as shown `in Fig. 4, is held within the keeper case 18 bya pawl 30, which engages the shoulder 22, this pawl being pivotediat 3l and pressed normally inward by a spring 32. This arrangement leaves the flat` face of the latch 21 flush with the face of the keeper plate 18. On the inner `sidewof the pawl 30 is a shoulder 33, which is `automatically engaged by a catch 34 which is carriedy by a spring 35, this being secured to a bent spring `36 which, at one end, is fastened to the` back of the case 18n at 37, and at its free end carries a smoothly rounded button or other smooth projection 38, which projects outward through a shoulder 38a in the case 18 and into the path of the door, so that the door"` will strike it endwi se when the door is closed.

acting on the shoulder 33, swings the pawl 30 out of engagement with the `shoulder 22 of the latch 21, and thelatter, impelled by the spring 23, swings outward into the hole of the lock case, displacing the ily 13 and locking the door, as heretofore described. When the door is to be opened, the spindle 24 is turned and the slide bolt 28 thrown against the iy 13 so as to push the Iiy and the latch 21 back to their normal positions, and as the` latch 21 swings inward, it passes the free end ofthe pawl -30which is pressed against it by the Hspring 32,and the pawl engages the shoulder 22 of the latch and holds the latter in the position shown in Fig. 4. It should be noticed that after the door has left the casing or frame, the button 38 is forced again outward to its normal position by the spring 36, which in turn carries with it the spring 35, and its catch 134, which catch immediately engages with the shoulder 33 ofthe pawl 30, thusleavin gall again in readiness for another similar operation. It should be also noted thatif the button 38 should by any accident be pressed in while the door is open, it will -merely throw out the latch 2l ready to be pressed into its normal place when the door shall next beclosed and Opened.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A door lock, comprisingthe usual case and lock spindle, a ily hinged in the opening of the lock case to swing at right angles to the plane of the face plate, a spring-pressed latch in the keeper plate ofthe door` frame, adapted to press inward against the fly, and a slide bolt carried by the lock spindle and disconnected from the tly but adapted to move the iy against the latch, substantially as dcscribed.

2.- A door lock, comprisingalockcase in the door, the usual knob spindle arranged transversely in the case,a ily hinged in the case to work at right angles to its face plate and adapted to close an opening therein, a slide ybolt disconnected from, but arranged to move endwise against the fly, means, as the tumblers and studs, for moving the bolt from the knob spindle,a keeperplate arranged in the usual way in the door frame, and a springpressed latch hung in thekeeperplate and adapted to displace the fly whenthe door is closed, substantially as described.

3. A door lock, comprising the usual lock case, a ily hung on the opening ofthe case, meansfor closing the ily from the lock spin- Hdle, a keeper plate arrangedin the door frame opposite the lock, a springpressed latch pivoted in an opening in the face of the keeper plate, a pawlto hold the latch within the keeper plate, and mechanism for releasing the pawl by the closing of the door, substantially as described.

4." The combination, with the door, the lock case therein, the lock spindle, the fly in an opening of the lock case, and means for closing the iy from the spindle, of a keeper plate IOO arranged in the door frame opposite the lock the catch so as to lift the pawl and release case, a. spring-pressed latch adapted to swing outward through' an opening in the keeper plate, a. pawl to hold the latch Within the keeper plate, a. spring-pressed catch to engage the pawl, and a button extending` into the path of the door and adapted to operate the latch, substantially as described.

WILLIAM W. DAVIS.

Witnesses WARREN B.l HUTCHINSON, EDGAR TATE. 

